<html>
<head>

</head>

<body>
    Hello World
    <input type="button" onclick="callJS()" value="callJS">
    <input type="button" onclick="callAndroid()" value="调用Android的方法">
    <input type="button" onclick="jumpActivity()" value="打开Android的Activity">
</body>

<script>
function callJS(){
	alert("Android 调用了JS方法");
}
function getCircleArea(r){
    return Math.PI * r * r;
}
function callAndroid(){
    android.hello("Android");
}
function jumpActivity(){
    jump.jump();
}
</script>
</html>